Nokia just posted its quarterly results - including shipped devices - and it's not looking good. Massive losses, sales dropping, and no growth in Lumia sales in the US. The company is losing money hand-over-fist, and with Windows Phone 8 still months away, the company warns the next quarter will be just as bad.

Also Windows Phone 8 is the very first iteration of the NT Kernel on ARM and mobile with the very first iteration of Metro and the RT API.
I would not expect that this is going anywhere antime soon. Microsoft products tend to need a certain time to become usable. Windows Destop was special in that the foundation was build up over years and just got improved (building a decade up on top to keep backwards compatible) but even ther SP1 was a must. More so when the foundation was improved like with Vista happened to a certain degree. The foundation is just very hard to maintain, fragile, to make changes in and they had to do a lot of changes for RT (probably most,ever done). SP1 for WP7, that is 7.5, still leaves many things unsolved.
With all the changes done and with the rush to bring out the product as soon as possible and with the try to target everything at once plus become with Surface a hardware+software vendor I have no doubt that Windows Phone 8 will be buggy as hell. It may take some quarters more till SP1, that is WP 8.5, is available and so the product becomes usable.